/*
 * (C) 2007-2012 Alibaba Group Holding Limited.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.taobao.gecko.core.util;

import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;

public class WorkerThreadFactory implements ThreadFactory {
	private static final AtomicInteger poolNumber = new AtomicInteger(1);
	private final ThreadGroup group;
	private final AtomicInteger threadNumber = new AtomicInteger(1);
	private final String namePrefix;

	public WorkerThreadFactory(ThreadGroup group, String prefix) {
		if (group == null) {
			SecurityManager s = System.getSecurityManager();
			this.group = s != null ? s.getThreadGroup() : Thread
					.currentThread().getThreadGroup();
		} else {
			this.group = group;
		}
		if (prefix == null) {
			this.namePrefix = "pool-" + poolNumber.getAndIncrement()
					+ "-thread-";
		} else {
			this.namePrefix = prefix + "-" + poolNumber.getAndIncrement()
					+ "-thread-";
		}
	}
	public WorkerThreadFactory(String prefix){
	    this(null,prefix);
	}

	public WorkerThreadFactory() {
		this(null,null);
	}

	public Thread newThread(Runnable r) {
		Thread t = new Thread(this.group, r, this.namePrefix
				+ this.threadNumber.getAndIncrement(), 0);
		if (t.isDaemon()) {
			t.setDaemon(false);
		}
		if (t.getPriority() != Thread.NORM_PRIORITY) {
			t.setPriority(Thread.NORM_PRIORITY);
		}
		return t;
	}

}